Kaisa is usually calm, but can be rather strict with rules. and a bit stern She has the uncanny ability to always know exactly what book people are looking for, even before they can ask her about it. she has some feelings of insecurity about her abilities as a witch, believing she wasn't the witch she was trained to be. She clearly showed worry that her teacher would be disappointed with her, and that she was nothing more than a librarian rather than a proper witch.